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What is the difference between simplex and duplex fiber optic cable?

Simplex Fiber Optic Cable from L-com.com
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Simplex Fiber Cable
A simplex fiber cable consists of a single strand of glass of plastic fiber. Simplex fiber is most often used where only a single transmit and/or receive line is required between devices or when a multiplex data signal is used (bi-directional communication over a single fiber).
Duplex Fiber Optic Cable from L-com.comclick image for more

 

Duplex Fiber Cable
A duplex fiber cable consists of two strands of glass or plastic fiber. Typically found in a “zipcord” construction format, this cable is most often used for duplex communication between devices where a separate transmit and receive are required.

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